The fastest path from
permit application to approval.
Co-sak is the agentic AI platform that gives developers, contractors, and architects certainty in the building permit process — catching every deficiency before it happens, and guiding every project to an approved outcome faster.
We're building the infrastructure layer for construction approvals in the Nordics. Less delay. Less risk. More builds.
The problem
Building something shouldn't mean months lost to bureaucracy.
The building permit process is one of the last major bottlenecks in construction that no one has systematically fixed. The cost isn't just time — it's capital sitting idle, projects at risk, and teams doing manual work that should never have been manual.
01
Deficiency notices derail projects
Up to 40% of all permit applications come back with deficiency notices, forcing costly restarts weeks or months into the process.
02
No single source of truth
Requirements vary across hundreds of municipalities, with no single source of truth. Knowing what a project actually needs is a full-time research job.
03
Every delay compounds
Missed approval windows mean missed construction seasons, missed financing milestones, and missed revenue.
The solution
From uncertainty to confidence before you even start.
Co-sak works across the full approval journey — researching requirements, validating your application, coordinating stakeholders, and predicting outcomes. Not as a consultant. As infrastructure.
Research
Hours spent manually finding requirements
Exact requirements matched to local rules, in minutes.
Validation
Deficiency notices arriving 3 months in
Every gap caught and resolved before submission.
Coordination
Chasing consultants, managing versions, tackling municipalities
One platform that keeps track of everything for you.
Prediction
No safety in outcome or timelines
Approval probability and processing time, before you submit.
Traction
Built on real data. Validated with real practitioners.
35 000+
Historical permit cases in our training dataset
Up to 90 %
Reduction in administrative workload
We're working with our first cohort of architects, developers, and contractors in the Oslo/Viken area. Interested in shaping the product?
Apply for early access →Why Co-sak
The right team, in the right market, at the right moment.
Built for Nordic permitting
We model the real approval process: municipality requirements, legal standards, and documentation expectations — not generic construction checklists.
Regulatory expertise meets AI execution
Our team has worked at the intersection of construction, AI, and compliance. That means we understand both what municipalities demand and what builders need to deliver.
Learning from real cases
Co-sak improves with every submitted case. Our models are trained on Norwegian permitting outcomes, enabling better prediction, fewer iterations, and more reliable decisions.
Every great building starts with an approved permit.
We make sure that part never slows you down. Co-sak is in early access. Join now and be part of the team that shapes how the Nordic construction industry gets built — faster, safer, and with confidence in the outcome.